Is it just me or do others completely balk at signing into sites with Facebook?

For some reason my survival instinct kicks in - sort of a combination of fight and flight simultaneously. I wrestle my way around it.

I just went to http://gtrot.com and it asked before running the search on my city if I wanted "Friend-powered personalization."

Happened with Trip Advisor too a couple of days ago.

It's total submission.

People on Facebook are not automatically my friends, they're just Facebook friends. But that's just a side point.. I'm put off by sites that are only, or compel a Facebook login. I don't know or even trust what is or what will happen behind the scenes.